<script>
  document.write('Hello, JavaScript');    // 输出一句话
</script>

<script>
  /*
    alert('Hello, JavaScript');
    console.log('1234');
  */
</script>
<p>
  <a href="file:///C:/Users/rise/Desktop/%E9%A6%96%E9%A1%B5/default/01.html">返回</a>
</p>